>Does the biblical creation narrative indicate that God stopped creating? If so, is that teaching at odds with our understanding of species development processes?<

This argument is used by some YECs, and I believe it has also been used by old-earth advocates who claim that the production of new species has stopped. However, in YEC usage, the same individual will often claim that God created thorns, diseases, etc. after the fall and carnivory after the Flood, in addition to implying creation or miraculous modification of things and laws in their Flood scenarios. The OEC version runs into problems in that many new species and even a few higher taxa have been produced during human history.